Investigation and application of pulse electromagnetic force generator for trailing control of welding stress
Investigation and application of pulse electromagnetic force generator for trailing control of welding stress
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发表时间：
2008
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通讯作者：
Fang Hongyuan
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作者：
Fang Hongyuan
高强度合金薄壁组织变形严重，易发生焊接热裂。为了解决这些问题，研制了一种新型脉冲电磁力发生器，在不直接接触焊件的情况下，利用脉冲电磁力控制焊接应力。力的大小可以通过改变储能电容的电压来控制，而力的频率也可以在10- 90hz之间设定。该发电机主电路结构简单，调整方便，可靠性好。仿真和实验结果表明，该发电机满足设计要求。采用脉冲电磁力进行鱼骨开裂试验，验证了脉冲电磁力对焊接热裂的控制能力。
The thin-walled structures of high-strength alloy have serious distortion and high susceptibility to welding hot cracking.To solve these problems,a new type of pulse electromagnetic force generator was developed to control welding stress in virtue of the pulse electromagnetic force during welding,without direct contacting the weldment.The magnitude of the force can be controlled by changing voltage of energy storage capacitor,while the frequency of the force can also be set in 10-90 Hz.The generator is characterized by simple structure of main circuit,convenient adjustment and excellent reliability.Simulation and experiment results indicate that the generator satisfies the requirement of design.The fishbone cracking test with pulse electromagnetic force confirms that the pulse electromagnetic force is capable of controlling welding hot cracking.